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Biomechanical concept and clinical outcome of dual mobility cups

Grazioli, Aron ; Ek, Eugene ; Rüdiger, Hannes

In: International Orthopaedics, 2012, vol. 36, no. 12, p. 2411-2418

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    Title
    • Biomechanical concept and clinical outcome of dual mobility cups
    Author
    • Grazioli, Aron. Department of Orthopaedics and Traumatology, Centre Hospitalier Universitaire Vaudois CHUV, Av Pierre Decker 4, 1011, Lausanne, Switzerland
    • Ek, Eugene. Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY, USA
    • Rüdiger, Hannes. Department of Orthopaedics and Traumatology, Centre Hospitalier Universitaire Vaudois CHUV, Av Pierre Decker 4, 1011, Lausanne, Switzerland
    Document Type
    • Postprint
    Classification
    • Health
    OAI-PMH Identifier
    • oai:doc.rero.ch:311152
    Summary
    Dual mobility cup systems in total hip arthroplasty consist of a metal back with a non-constrained liner, in which a constrained standard head articulates. While superior stability of such implants in comparison with standard total hip replacements is assumed, it is the purpose of this study to outline the biomechanical concept of dual mobility cups and to describe implant survival and dislocation rate based on the series published in the English-speaking and Francophone literature. A growing body of evidence indicates reduced dislocation rates in primary and revision total hip arthroplasty and in selected tumour cases. The limited availability of studies evaluating long-term implant survival and existing concerns with regard to increased wear rates and aseptic loosening, leads to the conclusion that such implants have to be used with prudence, particularly in standard primary hip arthroplasty and in young patients